<template>
<!-- ref明确拿到某个子组件 -->
    <div class="wrapper" ref="wrapper">
        <div class="content">
            <slot></slot>
        </div>
    </div>
</template>

<script>
import BScroll from 'better-scroll'

    export default {
        name: 'Scroll',
        data(){
            return {
                scroll:null,

            }
        },
        props:{
            probeType:{
                type:Number,
                default:0
            },
            pullUpLoad:{
                type:Boolean,
                default:false
            }
           
        },
        mounted(){
            //1、创建scroll对象
            this.scroll=new BScroll(this.$refs.wrapper,{
                click:true,
                probeType:this.probeType,
                pullUpLoad:this.pullUpLoad
            });

            // 2、监听滚动的位置
            this.scroll.on('scroll',(position)=>{
                // console.log(position);
                this.$emit('scroll',position)
            })

            // 3、监听上拉事件、监听scroll滚动到底部
            if(this.pullUpLoad){
                this.scroll.on('pullingUp',()=>{
                    // console.log('上拉加载更多');
                    this.$emit("pullingUp");
                })
            }

            // this.scroll.refresh();
        },
        methods:{
            scrollTo(x,y,time=500){
                this.scroll  && this.scroll.scrollTo(x,y,time);  
            },
            finishPullUp(){
                this.scroll && this.scroll.finishPullUp();
            },
            refresh(){
                // console.log('-------');
                this.scroll && this.scroll.refresh();
            },
            getScrollY(){
                return this.scroll?this.scroll.y:0;   
            }
        }
    }
</script>

<style scoped>

</style>